2019A&A...628A..44F


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.02CEST15:23:58

2019A&A...628A..44F - Astronomy and Astrophysics, volume 628A, 44-44 (2019/8-1)

Runaways and shells around the CMa OB1 association.

FERNANDES B., MONTMERLE T., SANTOS-SILVA T. and GREGORIO-HETEM J.

Abstract (from CDS):


Context. The origin of the arc-shaped Sh 2-296 nebula is still unclear. Mainly due to its morphology, the nebula has been suggested to be a 0.5Myr old supernova remnant (SNR) that could be inducing star formation in the CMa OB1 association. This means that the region might be an excellent laboratory for investigating the influence of massive stars on their surroundings.
Aims. We aim to show for the first time that the nebula is part of a large shell-like structure, which we have designated the "CMa shell", enclosing a bubble created by successive supernova (SN) explosions. We identify three runaway stars, associated with bow-shock structures, in the direction of the CMa shell, and we investigate the possibility that they have originated in the center of the shell.
Methods. By analyzing images of the CMa OB1 association at several wavelengths, we clearly saw that the Sh 2-296 nebula is in fact part of a large structure that can be approximated by a large elliptical shell (with a diameter of ∼60pc). Using the recent Gaia DR2 astrometric data, we traced back the path of the three runaway stars, in order to determine their original position in the past, with relation to the CMa shell. We also revised the heating and ionization of the Sh 2-296 nebula by comparing the photon budget provided by the O stars in the region with results from radio observations. Results. We find that the runaway stars have likely been ejected from a Trapezium-like progenitor cluster on three successive SN explosions that occurred ∼6, ∼2 and ∼1Myr ago. We also show that the few late-type O stars in the region cannot explain the ionization of the Sh 2-296 nebula, and that other mechanisms need to be at work. Conclusions. We argue that although we now have evidence for several SNe events in the CMa OB1 association, the SNe probably played a minor role in triggering star formation in these clouds. In contrast, the CMa OB1 association as it is now likely testifies to the last stages of a star-forming region.

Abstract Copyright: © ESO 2019

Journal keyword(s): ISM: supernova remnants - ISM: bubbles - ISM: kinematics and dynamics

Simbad objects: 48

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Number of rows : 48

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 GSH 138-01-94 sh 02 50 35.0 +58 00 15           ~ 15 0
2 * 53 Ari bC* 03 07 25.6726547580 +17 52 47.971172068 5.18 5.997 6.117     B1.5V 131 1
3 V* AE Aur Or* 05 16 18.1489437436 +34 18 44.347016027 5.48 6.18 5.96     O9.5V 524 1
4 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14824 1
5 NAME Barnard's Loop HII 05 27.5 -03 58           ~ 104 1
6 LHA 120-N 206A HII 05 31 15.2 -71 03 58           ~ 98 2
7 NAME Trapezium Cluster As* 05 35 16.5 -05 23 14           ~ 1466 1
8 M 42 HII 05 35 17.3 -05 23 28           ~ 3723 0
9 LHA 120-N 156 EmO 05 37 40 -69 34.4           ~ 6 0
10 RMC 136 Cl* 05 38 42.396 -69 06 03.36           ~ 1733 1
11 LHA 120-N 158 HII 05 39 11.220 -69 30 13.65           ~ 80 0
12 * mu. Col V* 05 45 59.8953630749 -32 18 23.164726112 3.84 4.90 5.18 5.30 5.57 O9.5V 456 0
13 PSR B0628-28 Psr 06 30 49.478 -28 34 43.13           ~ 264 0
14 HD 52721 Ae* 07 01 49.50977 -11 18 03.3219 5.88 6.65 6.59 7.52   B2Vne 201 0
15 V* Z CMa Ae* 07 03 43.1588002461 -11 33 06.230351311 10.51 9.99 8.80     B5/8eq+F5/7 532 3
16 IRAS 07016-1118 Cld 07 03 58.7 -11 23 19           ~ 22 0
17 LDN 1657B DNe 07 03 59.8 -11 22 18           ~ 5 0
18 NGC 2327 RNe 07 04 08 -11 19.0           ~ 6 0
19 IC 2177 RNe 07 04 25 -10 27.3           ~ 144 2
20 HD 53367 Ae* 07 04 25.5189757244 -10 27 15.613478141 6.81 7.40 6.96 7.92   B0IV/Ve 303 0
21 HD 53456 ** 07 04 38.30264 -11 31 26.6198 6.41 7.31 7.40     B1Ib/II 47 0
22 IRAS 07025-1204 Cld 07 04 52.4 -12 09 26           ~ 17 0
23 LDN 1657A DNe 07 05 05.8 -12 18 29           ~ 7 0
24 LBN 1039 HII 07 05 13 -12 19.0           ~ 41 0
25 HD 53623 *iN 07 05 16.7477934484 -12 19 34.492738033 7.02 8.88 8.87 8.84   B1II/III 67 1
26 V* V569 Mon bC* 07 05 49.63971 -10 39 36.2907 5.55 6.44 6.49 7.55   B1II/III 103 0
27 LBN 1033 HII 07 05.9 -11 13           ~ 41 1
28 HD 53975 * 07 06 35.9656022838 -12 23 38.216531612 5.38 6.40 6.50 6.51   O7.5Vz 176 0
29 HD 53974 ** 07 06 40.76672 -11 17 38.4396 4.59 5.44 5.39 6.80   B0IIIn 173 1
30 NAME CMa OB1 As* 07 07.0 -10 28           ~ 123 0
31 LBN 1038 HII 07 08 -11.9           ~ 1 0
32 V* W CMa C* 07 08 03.4363216943 -11 55 23.793216538 13.44 8.98 6.56 4.86 3.51 C-N5 110 0
33 NGC 2343 OpC 07 08 06 -10 37.0   7.05 6.7     ~ 63 0
34 NAME CMa R1 As* 07 08 21.3 -11 04 50           ~ 75 1
35 HD 54662 * 07 09 20.2488124291 -10 20 47.627880802 5.35 6.24 6.21 7.23   O7Vzvar? 316 2
36 HD 54879 SB* 07 10 08.1488998239 -11 48 09.835011060 6.8 7.60 7.65     O9.7V 65 0
37 NGC 2359 HII 07 18 30.000 -13 13 36.00           ~ 156 0
38 HD 57682 * 07 22 02.0544956184 -08 58 45.761168747 5.20 6.24 6.43     O9.2IV 232 0
39 HD 83277 Pe* 09 36 31.8227093397 -27 57 45.136257201   8.57 8.29     F2VkA3mA3_lB? 37 0
40 NAME Antlia SNR SNR 10 44 -37.2           ~ 13 1
41 NAME Carina Flare Supershell sh 10 57 -55.           ~ 15 0
42 Ass Car OB 2 As* 11 08 -60.2           ~ 76 0
43 SNR G349.7+00.2 SNR 17 18 10.160 -37 18 53.80           ~ 169 0
44 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 789 0
45 BD+43 3654 s*b 20 33 36.0795380204 +43 59 07.362541702   11.24 10.06     O4If 50 0
46 GSH 090-28-17 sh 22 46 +23.           ~ 5 0
47 NAME Local Bubble ISM ~ ~           ~ 693 0
48 NAME Carina Region reg ~ ~           ~ 152 0

    Equat.    Gal    SGal    Ecl

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2020.07.02-15:23:58

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